2. 计算机
  3. What is the effect of the following access list condition? access-list 101 permit ip 10．25．30．0 0．0．0．255 any

What is the effect of the following access list condition? access-list 101 permit ip 10．25．30．0 0．0．0．255 any

admin2019-04-08  16
问题 What is the effect of the following access list condition?
access-list 101 permit ip 10．25．30．0 0．0．0．255 any
选项 A、permit all packets matching the first three octets of the source address to all destinations
B、permit all packets matching the last octet of the destination address and accept all source addresses
C、permit all packets from the third subnet of the network address to all destinations
D、permit all packets matching the host bits in the source address to all destinations
E、permit all packets to destinations matching the first three octets in the destination address
答案A
解析 这是一个扩展的访问控制列表，他可以基于源和目的进行匹配，10．25．30．0 0．0．0．255匹配的是源地址凡是在这个范围的都被匹配了，而目的用的是any，表示任何。意思是从10．25．30．0/24的地址范围内的任何IP都可以访问任何的网段。
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